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Qwen3.5 122B and 35B models offer Sonnet 4.5 performance on local computers

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Re: Qwen3.5 122B and 35B models offer Sonnet 4.5 performance on local computers

#101
post #36

Qwen3.5-122B-A10B BF16 GGUF = 224GB. The "80Gb VRAM" mentioned here will barely fit Q4_K_S (70GB), which will NOT perform as shown on benchmarks. Quite misleading, really.

The larger 3.5 quants are actually pretty close to the full-blown 397B model's performance, at least looking at the numbers. Qwen 3.5 seems more tolerant of quantization than most.

Re: Qwen3.5 122B and 35B models offer Sonnet 4.5 performance on local computers

#102
If you're new to this: All of the open source models are playing benchmark optimization games. Every new open weight model comes with promises of being as good as something SOTA from a few months ago then they always disappoint in actual use.

I've been playing with Qwen3-Coder-Next and the Qwen3.5 models since they were each released.

They are impressive, but they are not performing at Sonnet 4.5 level in my experience.

I have observed that they're configured to be very tenacious. If you can carefully constrain the goal with some tests they need to pass and frame it in a way to keep them on track, they will just keep trying things over and over. They'll "solve" a lot of these problems in the way that a broken clock is right twice a day, but there's a lot of fumbling to get there.

That said, they are impressive for open source models. It's amazing what you can do with self-hosted now. Just don't believe the hype that these are Sonnet 4.5 level models because you're going to be very disappointed once you get into anything complex.

Re: Qwen3.5 122B and 35B models offer Sonnet 4.5 performance on local computers

#103
Ollama users: there are notable bugs with ollama and Qwen3.5 so don't let your first impression be the last.

Theory is that some of the model parameters aren't set properly and this encourages endless looping behavior when run under ollama:

https://github.com/ollama/ollama/issues?q=is%3Aissue%20state... (a bunch of them)

Re: Qwen3.5 122B and 35B models offer Sonnet 4.5 performance on local computers

#104

If you're new to this: All of the open source models are playing benchmark optimization games. Every new open weight model comes with promises of being as good as something SOTA from a few months ago then they always disappoint in actual use. I've been playing with Qwen3-Coder-Next and the Qwen3.5 models since they were each released. They are impressive, but they are not performing at Sonnet 4.5 level in my experien…

Are you saying that the benchmarks are flawed?

And could quantization maybe partially explain the worse than expected results?

Re: Qwen3.5 122B and 35B models offer Sonnet 4.5 performance on local computers

#105
post #64

Earlier quoted context omitted.

Running local AI models on a laptop is a weird choice. The Mini and especially the Studio form factor will have better cooling, lower prices for comparable specs and a much higher ceiling in performance and memory capacity.

I can never see the point, though. Performance isn't anywhere near Opus, and even that gets confused following instructions or making tool calls in demanding scenarios. Open weights models are just light years behind. I really, really want open weights models to be great, but I've been disappointed with them. I don't even run them locally, I try them from providers, but they're never as good as even the current Sonne…

I can't speak to using local models as agentic coding assistants, but I have a headless 128GB RAM machine serving llama.cpp with a number of local models that I use on a daily basis.

- Qwen3-VL picks up new images in a NAS, auto captions and adds the text descriptions as a hidden EXIF layer into the image, which is used for fast search and organization in conjunction with a Qdrant vector database.

- Gemma3:27b is used for personal translation work (mostly English and Chinese).

- Llama3.1 spins up for sentiment analysis on text.

Re: Qwen3.5 122B and 35B models offer Sonnet 4.5 performance on local computers

#106

If you're new to this: All of the open source models are playing benchmark optimization games. Every new open weight model comes with promises of being as good as something SOTA from a few months ago then they always disappoint in actual use. I've been playing with Qwen3-Coder-Next and the Qwen3.5 models since they were each released. They are impressive, but they are not performing at Sonnet 4.5 level in my experien…

Are you saying that the benchmarks are flawed? And could quantization maybe partially explain the worse than expected results?

The models outperform on the benchmarks relative to general tasks.

The benchmarks are public. They're guaranteed to be in the training sets by now. So the benchmarks are no longer an indicator of general performance because the specific tasks have been seen before.

> And could quantization maybe explain the worse than expected results?

You can use the models through various providers on OpenRouter cheaply without quantization.

Re: Qwen3.5 122B and 35B models offer Sonnet 4.5 performance on local computers

#107

Earlier quoted context omitted.

Are you saying that the benchmarks are flawed? And could quantization maybe partially explain the worse than expected results?

The models outperform on the benchmarks relative to general tasks. The benchmarks are public. They're guaranteed to be in the training sets by now. So the benchmarks are no longer an indicator of general performance because the specific tasks have been seen before. > And could quantization maybe explain the worse than expected results? You can use the models through various providers on OpenRouter cheaply without qua…

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Re: Qwen3.5 122B and 35B models offer Sonnet 4.5 performance on local computers

#108

If you're new to this: All of the open source models are playing benchmark optimization games. Every new open weight model comes with promises of being as good as something SOTA from a few months ago then they always disappoint in actual use. I've been playing with Qwen3-Coder-Next and the Qwen3.5 models since they were each released. They are impressive, but they are not performing at Sonnet 4.5 level in my experien…

Are you saying that the benchmarks are flawed? And could quantization maybe partially explain the worse than expected results?

Flawed? Possibly, but I think it's more that any kind of benchmark then becomes a target, and is inherently going to be a "lossy" signal as to the models actual ability in practice.

Quantisation doesn't help, but even running full fat versions of these models through various cloud providers, they still don't match Sonnet in actual agentic coding uses: at least in my experience.

Re: Qwen3.5 122B and 35B models offer Sonnet 4.5 performance on local computers

#109

If you're new to this: All of the open source models are playing benchmark optimization games. Every new open weight model comes with promises of being as good as something SOTA from a few months ago then they always disappoint in actual use. I've been playing with Qwen3-Coder-Next and the Qwen3.5 models since they were each released. They are impressive, but they are not performing at Sonnet 4.5 level in my experien…

Are you saying that the benchmarks are flawed? And could quantization maybe partially explain the worse than expected results?

No, what he is saying is that benchmarks are static and there is tremendous reputational and financial pressure to make benchmark number go up. So you add specific problems to training data... The result is that the model is smarter, but the benchmarks overstate the progress. Sure there are problem sets designed to be secret, but keeping secrets is hard given the fraction of planetary resources we are dedicating to making the AI numbers go up.

I have two of my own comments to add to that. First one is that there is problem alignment at play. Specifically - the benchmarks are mostly self-contained problems with well defined solutions and specific prompt language, humans tasks are open ended with messy prompts and much steerage. Second is that it would be interesting to test older models on brand new benchmarks to see how those compare.

Re: Qwen3.5 122B and 35B models offer Sonnet 4.5 performance on local computers

#110
post #80

Earlier quoted context omitted.

The hardware difference explains runtime performance differences, not task performance. Speculation is that the frontier models are all below 200B parameters but a 2x size difference wouldn’t fully explain task performance differences

Who would have thought ai labs with billions upon billions of r&d budget would have better models than a free alternative.

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